What is the CVSS score of CVE-2026-5496?

CVE-2026-5496 has a CVSS 3.0 base score of 7.8 (High). CVSS vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.0%.

Which versions of Proteus are affected by CVE-2026-5496?

Labcenter Electronics Proteus PDSPRJ file parser contains a type confusion vulnerability enabling remote code execution when users open malicious project files.

How to fix or mitigate CVE-2026-5496?

Within 24 hours: Identify all Proteus installations and users; restrict email delivery of PDSPRJ files via gateway rules and disable file-sharing platform access to PDSPRJ extensions. Within 7 days: Implement application whitelisting or behavioral monitoring on Proteus executable directories; conduct user awareness training on malicious file risks. Within 30 days: Monitor Labcenter Electronics advisories for patch availability; evaluate alternative design tools or air-gapped project review processes for high-risk design work.

Proteus CVE-2026-5496

EUVD-2026-21672 HIGH

Access of Resource Using Incompatible Type (Type Confusion) (CWE-843)

2026-04-11 zdi

RCE Memory Corruption Proteus

7.8

CVSS 3.0 · NVD

Severity by source

NVD PRIMARY

7.8 HIGH

AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Re-analysis Queued

Apr 27, 2026 - 17:52 vuln.today

cvss_changed

EUVD ID Assigned

Apr 11, 2026 - 01:00 euvd

EUVD-2026-21672

Analysis Generated

Apr 11, 2026 - 01:00 vuln.today

CVE Published

Apr 11, 2026 - 00:13 nvd

HIGH 7.8

DescriptionCVE.org

Labcenter Electronics Proteus PDSPRJ File Parsing Type Confusion Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Labcenter Electronics Proteus. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the parsing of PDSPRJ files. The issue results from the lack of proper validation of user-supplied data, which can result in a type confusion condition. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-25717.

AnalysisAI

Type confusion in Labcenter Electronics Proteus PDSPRJ file parser enables remote code execution when users open malicious project files. Attackers exploit insufficient validation during file parsing to trigger memory corruption, achieving arbitrary code execution with victim user privileges. Requires social engineering to deliver weaponized PDSPRJ files via email, web download, or file sharing. Publicly available exploit code exists (ZDI advisory disclosure). CVSS 7.8 reflects local attack vector requiring user interaction but no authentication.

Technical ContextAI

CWE-843 type confusion during PDSPRJ parsing allows attacker-controlled data to be interpreted as incorrect object type, corrupting memory structures. CVSS vector AV:L/PR:N indicates local exploitation without privilege requirements. Flaw originates in inadequate type validation of user-supplied file content within Proteus PCB design software.

RemediationAI

Vendor-released patch status not independently confirmed at time of analysis. Consult official Labcenter Electronics security advisories and apply latest Proteus software updates immediately. Review ZDI advisory for technical details: https://www.zerodayinitiative.com/advisories/ZDI-26-254/. Until patching: restrict PDSPRJ file sources to trusted origins only, disable automatic file preview features, implement application whitelisting to block unauthorized Proteus execution, and educate users on risks of opening unsolicited project files. Deploy endpoint detection solutions monitoring for abnormal Proteus process behavior indicative of exploitation attempts.